Incubator.



J. O. OLSON.

INOUBATOR.

APPLIGATION FILED 111111.27, 1912.

1,100,146. Patented June 16,1914. 7

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Inventor Attorneys JOHN O. OLSON, BED WING; MINNESOTA mcum'ron.

Specification of Letters 2mm.

Patented June 16, 1914.

Application filed March 27, 1912. Serial No. 686,607.

To all whom it may concern:

Be it known that I, JOHN O. OLsoN, a citizen of the United States, residing at Red Wing, in the county of Goodhue and State of Minnesota, have invented'a new and useful Incubator, of which the following is a specification.

The object of this invention is to provide a novel form of moistening device, and, specifically, to provide means whereby the capacity of a moistening chamber may be regulated and adjusted.

With the foregoing and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed without departing from the spirit of the invention.

In the accompanying drawings-Figure 1 shows the invention in vertical longitudinal section, parts appearing in elevation; Fig. 2 is a top plan, the lid of the outer case being removed; Fig. 3 is a sectional detail of the moistening mechanism and attendin parts; and Fig. 4 is a fragmental vertica section showing the means whereby the sectlons of the pipes are assembled with the cases.

In carrying out the invention there is pro-- vided an inner case 1, having outlets 2, securing a ventilation of the case. The case 1 is surrounded by an outer case 51. To one end 10 of the outer case 51 is secured a hood 3, within which is supported a water cup 4,

in any desired manner. 40.

In the present instance, the water cup 4 is upheld by an angle bracket 5, adjustably secured to the end wall 10 of the case 51 by means of a clamp and slot connection 6, permitting a lowering of the bracket 5, so that the cup 4 may be inserted into and be removed from the hood 3.

The upper end of the hood 3 is closed, and

and an outer wall 17, connected by a bottom 18 in which there are air inlet openings 19. The upper end of the outer wall 17 is connected with the cylindrical portion 20 of the drum, the same having a top 21, .provided with a draft outlet opening 22.

A hot air delivery pipe 23 enters one side of the cylindrical portion 20 of the drum. and passes inwardly through the end wall 11 of the sleeve 9, the end wall 11' preventing an indraft of air between the delivery pipe and the sleeve. The delivery pipe 23 extends along the longitudinal center of the case 1, substantially the full length of the case, the pipe 23 diverging, as shown at 24, to form a pair of return bends 25. The return bends 25 terminate in connections 26 which enter the delivery pipe 23, adjacent its initial end, as indicated at 27. Across the interior of the portions 26 of the return bends, imperforate partitions 28 extend, the partitions being located between the delivery pipe 23 and the extremities 30 and 32 of the. return bends 25. Thus' there are formed 1n the portions 26 of the return bends, heating chambers 29 which communicate with the delivery pipe 23 adjacent its initial end.

The portions 30 and 32 of the return bends enter an upright tapered vent pipe 31, the wider end of which is upwardly disposed, the narrower, lower end of the vent pipe entering the case 51 and communicating with thespace between the cases 51 and 1 as shown at 33.

Located within the case 1 is a thermostat 34, operatively connected with a lever 35, fulcrumed intermediate its ends in the end wall ofthe inner case and extendin through the end wall, of the outer, case. he outer end of the lever 35 is operatively united with a connection 36, connected at its upper end to the lever 37, supported u n a bracket 38, the free end of the lever 3 supporting a damper 40, positioned above the opening 22 in the top of the drum 15.

I practical operation, the lamp 14 will heat the drum 15 and cause the air to be drawn inwardly and upwardly through the openings 19 in the bottom of the drum, the air being heated by contact with the outer face of the inner wall 16. From the drum 15, the heated air will enter the delivery pipe 23, and traverse the return bends 25 thereof, the heated air passing into the extremities 30 and 32 of the return bends, and

thus entering the vent pipe 31. The heated the temperature within the cham ers 29 will be raised, causin a heating of the partitions 28, and causmg a heating of the air which lies between the partitions and the portions 30 and 32 of the return bends.

Therefore, the air as it passes from the return bends 25, into the portions 30 and 32 of the return bends, will be heated to someextent, before it enters the vent pipe 31. Since the air is thus heated, prior to entering the-vent pipe 31, the draft through the vent pipe will be increased accordingly.

When the air within the case 1 is drawn .outwardly through the openings 2 and beneath the case 1 through the vent pipe 31, in the manner hereinbefore described, fresh air will be drawn upwardly through the hood 3, about the water on 4, the entering air bein thus moistened. lhe air entering the hoo 3 will traverse the pipe supply 7, controlled by the damper 8, and enter the sleeve 9, the outer end of which is closed.

.As the air enters the sleeve 9 it will come into contact with the initial end of the delivery pipe 23 and be heated, a supply of moist, fresh, heated air thus passing into the casing 1, through the open inner end of thesleeve 9.

The function of the thermostat 34 and the parts controlled thereby is common and well understood and needs no specific explanation.

Broadly considered, the present invention comprises, as shown in Fig. 3, an air supply pipe 7 which is open at one end to define a moistening chamber represented by the hood 3. A moistening device represented by the cup 4 is located in the chamber 3, and a support 5 for the cup is provided, the support being movable to shift the position of the cup in the chamber 3, thereby to vary the capacity of the chamber.

Having thus described the invention, what is claimed is In a device of the class described, an air supply pipe open at one end to define a moistening chamber; a moistening device in the chamber; and a sup ort for the moistenin device, the support ing movable to shi t the position of the moistening device in the chamber thereby to vary the capacity of the chamber.

In testimony that I claim the foregoing as my own, I have hereto aflixed my signature in the presence of two witnesses.

JOHN o. OLSON.

Witnesses:

CHAS. M. ANDERSON, Tnos. Moms. 

